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The moon, mass 7.35×1022 kg, rotates around the earth in about 28 days. If the moon is about 3.84×105 km from the earth, what is the earths gravitational attraction (pull) on the moon? What is the moons gravitational attraction (pull) on the earth?
If a simple pendulum of length 2.09 meters is subjcted to a restoring force of 3 Newtons when displaced .15546 meters from equilibrium, what is the mass of the pendulum
How many revolutions does wheel make throughout the time
1. an aluminum block weighs 12n in air and 8n in water. what is the mass of the block?2. how much energy would it take
A colonial gunner sets up his 225-kg cannon at the edge of the flat top of a high tower. It shoots a 4.5-kg cannonball horizontally. The ball hits the ground 215 m from the base of the tower. The cannon also move on frictionless wheels, and falls off..
A candle is placed 16.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 6.5cm farther away from the mirror. Find the focal length of the convex mirror.
A thin layer of a transparent material with an index of refraction of 1.26 is used as a non reflective coating on the surface of glass with an index of refraction of 1.58. What should the thickness of the material be for it to be nonreflecting for ..
ski jumper leaves the ski track moving at 25 m/s. The landing incline below her falls off with a slope of 33 degrees. How long is the ski jumper in the air
0.60 kg of ice at -10oC is placed in 0.30 kg of water at50oC. How much liquid water is there when the system reaches thermal equilibrium?
A piece of metal is released under water. The volume of the metal is 38.1 cm3 and its specific gravity is 5.1. Evaluate what is its initial acceleration
A 16.0 kg wheel, essentially a thin hoop with radius 1.70 m, is rotating at 426 rev/min. It must be brought to a stop in 11.0 s. How much work must be done to stop it
A horizontal pipeline carries 10,125 m^3 of oil every hour. Along the pipeline where the radius is 60 cm, the oil pressure is 170 kpa. The density of the oil is 800 kg/m^3. What is the oil's speed in the pipeline where the radius is 60 cm? What is th..
A 900 kg car travelling east at 15 m/s collides with 750 kg travelling north at 20 m/s. what is the speed of the wreckage
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